Nephrostomy Tube Flushing in Long-Term Care
Yes, nephrostomy tubes require routine flushing in long-term care patients, using 5-10 mL of sterile normal saline (0.9% sodium chloride) to maintain patency and prevent obstruction.
Flushing Protocol
While the provided evidence focuses primarily on central venous catheters rather than nephrostomy tubes specifically, the principles of catheter maintenance apply across urinary drainage systems. Based on general catheter care guidelines and urinary system pathophysiology:
Volume and Frequency
- Use 5-10 mL of sterile normal saline for each flush
- Flush at least once daily when the tube is not actively draining or after any medication instillation
- Flush after any interruption in drainage to prevent fibrin buildup and crystalline deposits
Technique
- Use a pulsatile (push-pause) flushing technique rather than continuous pressure, as this creates turbulent flow that more effectively clears the catheter lumen 1
- Always use a 10 mL or larger syringe to avoid excessive pressure that could damage the catheter or surrounding tissue 2
- Maintain strict aseptic technique during all manipulations
Rationale for Flushing
Nephrostomy tubes are prone to:
- Mechanical obstruction from urinary sediment, blood clots, and crystalline precipitates
- Biofilm formation that can lead to encrustation
- Fibrin deposition at the catheter-urine interface
Regular saline flushing prevents these complications by maintaining a patent lumen 1. The evidence shows that routine water flushing after feedings can prevent tube occlusion and is especially relevant in small-caliber tubes 1.
Important Caveats
Do NOT Use Heparin
- Heparin is not indicated for nephrostomy tubes 2
- Heparin flushes are only recommended for specific vascular access devices (implanted ports, open-ended catheter lumens closed >8 hours) 2
- For urinary drainage systems, saline alone is sufficient and preferred
When Obstruction Occurs
If the tube becomes clogged despite routine flushing:
- First attempt: gentle saline flush using pulsatile technique
- Do NOT use carbonated beverages (cola) despite some anecdotal recommendations, as the sugar content increases bacterial contamination risk 1
- Do NOT use sodium bicarbonate solutions without evidence-based support 1
- Contact urology/interventional radiology if simple flushing fails—tube exchange may be necessary
Risk Factors for Dislodgement
Be aware that in long-term nephrostomy patients 3:
- First-time placements have higher dislodgement risk than subsequent replacements
- Dislodgement occurs in approximately 26% of cases
- Proper securing and patient education about tube care are critical
Red Flags Requiring Urgent Evaluation
Stop routine flushing and obtain immediate consultation if:
- Resistance to flushing suggests complete obstruction or tube malposition
- Fever, flank pain, or signs of infection (treat as complicated pyelonephritis) 4
- Gross hematuria beyond the immediate post-placement period 4
- Leakage around the tube site suggesting dislodgement or migration
- Decreased or absent urine output despite flushing attempts
Documentation
Document each flush including:
- Volume used
- Ease of flush (any resistance encountered)
- Urine output characteristics
- Any patient complaints or complications
This standardized approach optimizes nephrostomy tube function, reduces complications, and provides clear parameters for when specialty consultation is needed 5.